Vulnerability identifier: #VU54666
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-200
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Nextcloud Mail
Web applications /
Modules and components for CMS
Vendor: Nextcloud
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the affected application does by default not render images in emails to not leak the read state. A remote attacker can gain unauthorized access to sensitive information on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Nextcloud Mail: 1.9.0 - 1.9.5
External links
http://github.com/nextcloud/security-advisories/security/advisories/GHSA-xxp4-44xc-8crh/
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.